What Dish is real Cuisine in Tokyo?

I have never eaten genuine(real) Italian, Spanish, American, Chinese foods in the restaurants in Tokyo. I can have seen/tried similar ones like the places which we can eat delicious foods easily, e.g. 100yen Sushi and fastfoods restaurants. (It doesn't mean cheap dishes are third-classes) When I imagine our how to connect foods in recently, I felt We have changed our food style with being affected by foods' trend. Just 50 years ago, Japanese people used to eat rice, vegetables, and fish. Most of the Japanese dishes are good for health in the nutrition. In contrast, in the period including our generation, really like instants, frozen food, and deli. According to the investigation about food behavior in Japan, it shows our food style really are different from previous one. When we walk along the street, it is very much easy to find fastfood restaurants and convenience stores within 5 minute.

(I totally didin't talk about this article...)finally, I'd like to say the best cuisine for me is home-made dishes by my mother!

News and information from the article : "Tokyo 'world's best place to eat'"
http://news.bbc.co.uk/2/hi/asia-pacific/8364051.stm